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To do so technically would require a more sophisticated grammar, like a Chomsky Type 1 grammar, also termed a context-sensitive grammar. However, parser generators for context-free grammars often support the ability for user-written code to introduce limited amounts of context-sensitivity.
Van Wijngaarden grammars address the problem that context-free grammars cannot express agreement or reference, where two different parts of the sentence must agree with each other in some way. For example, the sentence "The birds was eating" is not Standard English because it fails to agree on number. A context-free grammar would parse "The ...
A weighted context-free grammar (WCFG) is a more general category of context-free grammar, where each production has a numeric weight associated with it. The weight of a specific parse tree in a WCFG is the product [ 7 ] (or sum [ 8 ] ) of all rule weights in the tree.
Generative grammar proposes models of language consisting of explicit rule systems, which make testable falsifiable predictions. This is different from traditional grammar where grammatical patterns are often described more loosely. [9] [10] These models are intended to be parsimonious, capturing generalizations in the data with as few rules as ...
The sentence (2b) does not have a high low tone on the verb nɔ́ʔ and tense ʤʉ̀n, therefore is not grammatical. (2b) *[CP á wʉ́ Wàtɛ̀t nɔ́ʔ [vP ⁿ-ʤʉ́n á?]] *'Who did Watat see?' To generate the grammatical sentence (2a), the wh-phrase á wʉ́ moves from the vP phase to the CP phase. To obey PIC, this movement must take two ...
A sentence diagram is a pictorial representation of the grammatical structure of a sentence. The term "sentence diagram" is used more when teaching written language, where sentences are diagrammed. The model shows the relations between words and the nature of sentence structure and can be used as a tool to help recognize which potential ...
Traditional grammar (also known as classical grammar) is a framework for the description of the structure of a language or group of languages. [1] The roots of traditional grammar are in the work of classical Greek and Latin philologists. [2] The formal study of grammar based on these models became popular during the Renaissance. [3]
When a Packrat parser uses cut operators, it effectively clears its backtracking stack. This is because a cut operator reduces the number of possible alternatives in an ordered choice. By adding cut operators in the right places in a grammar's definition, the resulting Packrat parser only needs a nearly constant amount of space for memoization ...